Water retainer is a new type of polymer material with high water absorption rate, fast water absorption rate and strong water retention capacity. It has been widely used in medicine, health, daily use, industry, agriculture, forestry, construction and other industries. In recent decades, water retainers have developed rapidly and formed a series of products with vinyl monomers and natural polyhydroxy polymers as the main raw materials.
At present, the main defects of agricultural and forestry water retainers are: (1) high price; (2) some manufacturers make improper selection of raw materials, which causes soil acidification, soil compaction and destruction of the original soil aggregate structure after application. The final result is that the use of water retainers causes the opposite result; (3) poor salt resistance, resulting in poor repeated water absorption capacity in the soil, and some products can only be used once; (4) most products themselves do not have any nutrients required for plant growth, and also affect the use effect of chemical fertilizers; (5) physical properties of the product have caused the soil to deteriorate.
Application of humic acid as water retainer
In the face of this situation, using humic acid as a raw material for agricultural and forestry water retainers can avoid the above defects. Due to its good chemical and biological activity, humic acid is used as the raw material of synthetic water retaining agent to prepare humic acid-based water retaining agent, which can not only play the effect of humic acid in stimulating plant growth and development, increasing the stress resistance of crops, and improving plant nutrition, but also improve the fertilizer and water retention capacity of the soil, and at the same time can greatly reduce the production cost. The cost price of the synthesized water retaining agent is more than 50% lower than the price of the commonly available high-efficiency water retaining agent, which is very suitable as the raw material of the special water retaining agent in the field of agriculture and forestry. In addition, its water absorption rate for tap water and groundwater can reach 100 to 500 times, and the water absorption speed is 5 to 40 minutes, which can achieve the required water absorption.